Table 3

Statistical correlations between peritumoural lymphatic vessel density and the various clinicopathological parameters of the 52 analysed colorectal carcinomas, investigated using Mann–Whitney and Kruskall–Wallis tests

Parameter	n	Mean rank	95% CI for the median	p Value
Sex
Male	30	26.21	0 to 15.5	0.871
Female	22	26.88	0 to 16.75	0.871
Age
≤70	26	27.82	5.65 to 15.5	0.527
>70	26	25.17	0 to 15.5	0.527
Site
Left colon	36	29.68	7.39 to 15.87	0.023
Right colon	16	19.34	0 to 12.59	0.023
Grade
1	14	31.14		0.294
2	35	24.27	NA^*
3	3	30.83
T
T1	5	31.4	NA^†	0.447
T2	47	25.97	0 to 14.05	0.447
Vascular endothelial growth factor expression
Low (0–50% positive cells)	27	21.35	0 to 12.2	0.009
High (51–100% positive cells)	25	32.06	8.42 to 17.53	0.009
Disease progression
Not	23	20.3	0 to 8.8	0.008
Yes	29	31.41	11.16 to 16.85	0.008

↵* Not available for comparison of three groups.
↵† Not available for small sample.